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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-09-27 11:45:12 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-06 01:23:59 +0300 |
| commit | ca76f5b6bdbdc50af0d7b98cfcf7a2be7e95eb3d (patch) | |
| tree | 66466c3c9923273ee492b5ea1137f800289bc790 /include/linux | |
| parent | fba597db4218ac324eee34b64736ea94829c95bf (diff) | |
| download | linux-ca76f5b6bdbdc50af0d7b98cfcf7a2be7e95eb3d.tar.xz | |
pipe: add pipe_buf_steal() helper
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/pipe_fs_i.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 654413334537..bddccf0159bb 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h @@ -151,6 +151,17 @@ static inline int pipe_buf_confirm(struct pipe_inode_info *pipe, return buf->ops->confirm(pipe, buf); } +/** + * pipe_buf_steal - attempt to take ownership of a pipe_buffer + * @pipe: the pipe that the buffer belongs to + * @buf: the buffer to attempt to steal + */ +static inline int pipe_buf_steal(struct pipe_inode_info *pipe, + struct pipe_buffer *buf) +{ + return buf->ops->steal(pipe, buf); +} + /* Differs from PIPE_BUF in that PIPE_SIZE is the length of the actual memory allocation, whereas PIPE_BUF makes atomicity guarantees. */ #define PIPE_SIZE PAGE_SIZE |